WO2022041808A1

WO2022041808A1 - Robot base apparatus capable of energy storage, buffering, and energy dissipation, and energy dissipation method

Info

Publication number: WO2022041808A1
Application number: PCT/CN2021/089524
Authority: WO
Inventors: 沈卫华; 李晓
Original assignee: 南京禹智智能科技有限公司
Priority date: 2020-08-24
Filing date: 2021-04-25
Publication date: 2022-03-03
Also published as: CN112065918A

Abstract

A robot base capable of energy storage, buffering, and energy dissipation, and an energy dissipation method, the apparatus comprising a first support panel, a second support panel is provided on an upper side of the first support panel, round holes are dug out in all four corners of an upper end of the second support panel, two first C-shaped bent rods are arranged on the upper side of the second support panel, two ends of the two first C-shaped rods are inserted respectively into the four round holes and fixedly connected to an upper end of the first support panel, a first spring is sleeved onto each of two ends of the two first C-shaped bent rods, the four first springs are all located between the first support panel and the second support panel, a rack is fixedly connected to the side close to each of the two round holes, a concentric-square-shaped fixing panel is fixedly connected to an upper end of the support panel, the apparatus and energy dissipation method decrease the damage dealt to the robot when struck or shaken, extend the use life of the robot, save maintenance costs, and improve robot protective results.

Description

A kind of robot base energy storage buffer energy dissipation device and energy dissipation method

technical field

The invention relates to the technical field of robot base equipment, and more particularly, to an energy storage buffering energy dissipation device for a robot base.

Background technique

A robot is an intelligent machine that can work semi-autonomously or fully autonomously. The earliest robots in history were found in puppet robots created by craftsmen ordered by Emperor Yang of the Sui Dynasty. Robots have basic characteristics such as perception, decision-making, and execution. They can assist or even replace humans in completing dangerous, heavy and complex work, improve work efficiency and quality, serve human life, and expand or extend the scope of human activities and capabilities. With the deepening of the understanding of the nature of technological intelligence, robotics technology has begun to penetrate into all fields of human activities. Combining the application characteristics of these fields, people have developed a variety of special robots and various intelligent robots with perception, decision-making, action and interaction capabilities. Although there is no strict and accurate definition of a robot, we hope to have some grasp of the essence of a robot: a robot is a mechanical device that performs work automatically. It can accept human command, run pre-programmed programs, or act according to principles and programs formulated with artificial intelligence technology. Its mission is to assist or replace human work. It is the product of advanced integrated cybernetics, mechatronics, computers, materials, and bionics, and has important uses in industry, medicine, agriculture, services, construction, and even the military.

The buffering and shock absorption effect of the existing robot base is not good, and it cannot effectively protect the robot when it encounters an impact. Therefore, we propose an energy storage buffering energy dissipation device for the robot base.

technical problem

In view of the problems existing in the prior art, the purpose of the present invention is to provide an energy storage buffer energy dissipation device for a robot base, which can reduce the damage of the robot when it is subjected to impact and vibration, prolong the service life of the robot, save maintenance costs, and improve the The protection effect of the robot is extremely practical.

technical solutions

In order to solve the above problems, the present invention adopts the following technical scheme:

An energy storage, buffering and energy dissipation device for a robot base, comprising a first support plate, a second support plate is arranged on the upper side of the first support plate, and round holes are drilled at four corners of the upper end of the second support plate, so the The upper side of the second support plate is provided with two first C-shaped bent rods, and the two ends of the two first C-shaped bent rods are respectively inserted into the four circular holes and fixedly connected to the upper end of the first support plate. , both ends of the two first C-shaped bending rods are sleeved with first springs, and the four first springs are located between the first support plate and the second support plate, and the two circular holes are opposite to each other. The close end is fixedly connected with a rack, the upper end of the second support plate is fixedly connected with a loop-shaped fixed plate, and the rear inner wall of the loop-shaped fixed plate is rotated from left to right through four second rotating shafts. A third gear, a fourth gear, a second gear and a first gear, the third gear is meshed with the left rack and the fourth gear, the fourth gear is meshed with the second gear, and the second gear The first gear is meshed and connected to the first gear, the first gear is meshed and connected to the right rack, the front end of the fourth gear is fixedly connected with a first bevel gear, and the upper end of the second support plate rotates through the first shaft A second bevel gear is connected, the second bevel gear is meshed and connected to the first bevel gear, the upper end of the second bevel gear is fixedly connected with a rotating rod, and the circumferential surface of the rotating rod is fixedly connected with the first bevel gear. Five gears, the front and rear parts of the fifth gear are respectively meshed with a fourth rack and a third rack, and the right end of the third rack and the left end of the fourth rack are fixedly connected with a second C-shaped bend A protection plate is fixedly connected to the ends of the two second C-shaped bending rods away from each other, a sealing cover is arranged on the upper end of the circular fixing plate, and installation holes are drilled at the left and right ends of the sealing cover. The two mounting holes are respectively matched with the two limit fixing plates, the lower side of the sealing cover is provided with a limiting mechanism, the front and rear sides of the sealing cover are provided with two locking mechanisms, the two The upper side of the first C-shaped bending rod is provided with an elastic mechanism, which can ultimately reduce the damage of the robot when it is subjected to impact and vibration, prolong the service life of the robot, save maintenance costs, and improve the protection effect of the robot, and is extremely practical.

As a preferred solution of the present invention, the limiting mechanism includes a limiting ring, the limiting ring is fixedly connected to the lower end of the sealing cover, and the rotating rod is rotatably connected in the limiting ring.

As a preferred solution of the present invention, the locking mechanism includes a fixed buckle, a hinge shaft and a threaded groove, the fixed buckle is hinged to the front end of the sealing cover through the hinge shaft, and the threaded groove is cut out on the back of the circular fixing plate. At the front end, the fixing buckle is matched with the threaded groove.

As a preferred solution of the present invention, the elastic mechanism includes a third support plate, a second spring, a support rod and a limit plate, and the third support plate is fixedly connected to the front ends of the upper ends of the two first C-shaped bent rods The support rod is fixedly connected to the front of the upper end of the second support plate, the support rod penetrates the third support plate, the limit plate is fixedly connected to the upper end of the support rod, and the second spring is sleeved on the support rod The circumferential surface of the rod, the second spring is located between the limit plate and the third support plate.

As a preferred solution of the present invention, the left and right inner walls of the loop-shaped fixing plate are fixedly connected with two limit fixing plates, and the two ends of the two second C-shaped bending rods are respectively inserted into the four limit positions inside the fixed plate.

As a preferred solution of the present invention, the surfaces of the two protective plates are both wrapped with rubber sleeves, and the surfaces of the two rubber sleeves can be provided with anti-skid patterns.

As a preferred solution of the present invention, the lengths of the third gear, the fourth gear, the second gear and the first gear are the same.

As a preferred solution of the present invention, a non-slip sponge pad is fixedly connected to the lower end of the first support plate.

As a preferred solution of the present invention, the first support plate, the second support plate, the return-shaped fixing plate, the sealing cover and the two protection plates are all made of stainless steel, and the first support plate, the second support plate, the back plate are made of stainless steel. The surfaces of the shape fixing plate, the sealing cover and the two protective plates are all galvanized.

beneficial effect

(1) In this scheme, when the external force in the up and down direction is applied, the second support plate moves up and down, the first spring and the second spring are stretched or compressed, the rack moves downward, and the movement of the rack drives the third gear, the fourth The gear, the second gear and the first gear rotate, the rotation of the fourth gear drives the rotation of the first bevel gear, the rotation of the first bevel gear drives the rotation of the second bevel gear, and the rotation of the second bevel gear drives the rotation of the fifth bevel gear. The rotation of the gear and the rotation of the fifth gear drive the left and right movement of the third rack and the fourth rack, and the left and right movement of the third rack and the fourth rack drives the left and right movement of the two protective plates to buffer the external force in the upper and lower directions. When receiving an external force in the left and right directions, the protection plate moves left and right, the movement of the protection plate drives the left and right movement of the fourth rack and the third rack, and the movement of the fourth rack and the third rack drives the rotation of the fifth gear. The rotation of the fifth gear drives the rotation of the second bevel gear, the rotation of the second bevel gear drives the rotation of the first bevel gear, and the rotation of the first bevel gear drives the third gear, the fourth gear, the second gear and the first bevel gear. The rotation of a gear, the rotation of the third gear and the first gear drive the up and down movement of the two racks, the up and down movement of the two racks drives the up and down movement of the second support plate, the first spring and the second spring are compressed or pulled stretch to buffer the external force in the left and right directions.

(2) This scheme is provided with a limit fixing plate, and the setting of the limit fixing plate is beneficial to prevent the first bevel gear and the fourth rack from being separated from the fifth gear and prevent the occurrence of tooth slip.

Description of drawings

Fig. 1 is a first perspective exploded view of a robot base energy storage buffer energy dissipation device according to the present invention;

Figure 2 is a second perspective exploded view of a robot base energy storage buffer energy dissipation device of the present invention;

Fig. 3 is a third perspective exploded view of a robot base energy storage buffer energy dissipation device according to the present invention;

4 is a perspective view of a robot base energy storage buffer energy dissipation device according to the present invention;

FIG. 5 is a plan exploded view of a robot base energy storage buffer energy dissipation device according to the present invention.

Description of the labels in the figure:

1 first support plate, 2 first spring, 3 first C-shaped bent rod, 4 second support plate, 5 third support plate, 6 support rod, 7 second spring, 8 limit plate, 9 round hole, 10 Rack, 11 first gear, 12 second gear, 13 third gear, 14 fourth gear, 15 first bevel gear, 16 second bevel gear, 17 lever, 18 fifth gear, 19 thread groove, 20 Second shaft, 21 Back-shaped fixing plate, 22 Protection plate, 23 Second C-shaped bending rod, 24 Limit fixing plate, 25 Third rack, 26 Fourth rack, 27 Seal cover, 28 Mounting hole, 29 Fixed buckle, 30 hinge shaft, 31 limit ring.

Embodiments of the present invention

Please refer to FIGS. 1-5 , an energy storage, buffering and dissipating device for a robot base includes a first support plate 1 , a second support plate 4 is arranged on the upper side of the first support plate 1 , and the four corners of the upper end of the second support plate 4 Round holes 9 are drilled, and two first C-shaped bent rods 3 are arranged on the upper side of the second support plate 4, and the two ends of the two first C-shaped bent rods 3 are respectively inserted into the four round holes 9 and fixed. Connected to the upper end of the first support plate 1, both ends of the two first C-shaped bending rods 3 are sleeved with first springs 2, and the four first springs 2 are located on the first support plate 1 and the second support plate 4. The rack 10 is fixedly connected to the close ends of the two circular holes 9 , the upper end of the second support plate 4 is fixedly connected to a loop-shaped fixing plate 21 , and the rear inner wall of the loop-shaped fixing plate 21 passes sequentially from left to right. The four second shafts 20 are rotatably connected with a third gear 13, a fourth gear 14, a second gear 12 and a first gear 11. The third gear 13 is meshed with the left rack 10 and the fourth gear 14. The gear 14 is engaged with the second gear 12, the second gear 12 is engaged with the first gear 11, the first gear 11 is engaged with the right rack 10, and the front end of the fourth gear 14 is fixedly connected with the first bevel gear 15. The upper end of the second support plate 4 is rotatably connected with a second bevel gear 16 through the first shaft, the second bevel gear 16 is meshed with the first bevel gear 15, and the upper end of the second bevel gear 16 is fixedly connected with a The rotating rod 17, the circumferential surface of the rotating rod 17 is fixedly connected with the fifth gear 18, the front and rear parts of the fifth gear 18 are meshed with the fourth rack 26 and the third rack 25 respectively, and the right end of the third rack 25 and The left end of the fourth rack 26 is fixedly connected with a second C-shaped bending rod 23 , the ends of the two second C-shaped bending rods 23 away from each other are fixedly connected with a protection plate 22 , and the upper end of the return-shaped fixing plate 21 is provided with a seal. Cover 27, the left and right ends of the sealing cover 27 are drilled with mounting holes 28, the two mounting holes 28 are respectively matched with the two limit fixing plates 24, the lower side of the sealing cover 27 is provided with a limiting mechanism, the front and rear of the sealing cover 27 Two locking mechanisms are provided on both sides, and elastic mechanisms are provided on the upper sides of the two first C-shaped bending rods 3 .

In this embodiment, the upward movement of the two racks 10 drives the first gear 11 to rotate counterclockwise and the third gear 13 rotates clockwise, respectively, the counterclockwise rotation of the first gear 11 drives the second gear 12 to rotate clockwise, the second The clockwise rotation of the gear 12 drives the fourth gear 14 to rotate counterclockwise, and the clockwise rotation of the third gear 13 drives the counterclockwise rotation of the fourth gear 14 to realize the normal rotation of the fourth gear 14 under two external forces, and the second gear 14 rotates normally under two external forces. 12 plays the role of connecting the fourth gear 14 and the first gear 11, preventing the rotation direction of the first gear 11 from hindering the rotation of the fourth gear 14, and the rotation of the fifth gear 18 drives the third rack 25 and the fourth tooth. The bar 26 moves left and right, and the first bevel gear 15 drives the second bevel gear 16 to rotate to change the direction of rotation.

Specifically, please refer to FIG. 5 , the limit mechanism includes a limit ring 31 , the limit ring 31 is fixedly connected to the lower end of the sealing cover 27 , and the rotating rod 17 is rotatably connected to the limit ring 31 .

In this embodiment, the limit ring 31 is fixedly connected to the lower end of the sealing cover 27, and the rotating rod 17 is rotatably connected to the limit ring 31, so as to prevent the fifth gear 18 and the third rack 25 from being caused by tilting when the rotating rod 17 rotates. The teeth of the four racks 26 are slippery.

1-5, the locking mechanism includes a fixed buckle 29, a hinge shaft 30 and a threaded groove 19, the fixed buckle 29 is hinged to the front end of the sealing cover 27 through the hinge shaft 30, and the threaded groove 19 is cut out in the loop for fixing At the front end of the plate 21 , the fixing buckle 29 is matched with the threaded groove 19 .

In this embodiment, the fixing buckle 29 is hinged to the front end of the sealing cover 27 through the hinge shaft 30, the fifth gear 18 is cut out on the front end of the circular fixing plate 21, and the fixing buckle 29 matches the fifth gear 18, which is beneficial to realize the fixing The position of the sealing cover 27 protects the internal structure of the return-shaped fixing plate 21 and facilitates installation, disassembly and maintenance.

Specifically, please refer to the figure, the elastic mechanism includes a third support plate 5 , a second spring 7 , a support rod 6 and a limit plate 8 , and the third support plate 5 is fixedly connected to the front ends of the upper ends of the two first C-shaped bent rods 3 . The support rod 6 is fixedly connected to the front of the upper end of the second support plate 4, the support rod 6 penetrates the third support plate 5, the limit plate 8 is fixedly connected to the upper end of the support rod 6, and the second spring 7 is sleeved on the support rod 6 , the second spring 7 is located between the limiting plate 8 and the third support plate 5 .

In this embodiment, the third support plate 5 is fixedly connected to the upper end fronts of the two first C-shaped bent rods 3 , the support rod 6 is fixedly connected to the upper end front of the second support plate 4 , and the support rod 6 penetrates the third support Plate 5, the limit plate 8 is fixedly connected to the upper end of the support rod 6, the second spring 7 is sleeved on the circumferential surface of the support rod 6, the second spring 7 is located between the limit plate 8 and the third support plate 5, which is beneficial to Enhance the buffering effect of this device.

Specifically, please refer to FIGS. 1-5 , the left and right inner walls of the return-shaped fixing plate 21 are fixedly connected with two limit fixing plates 24 , and the two ends of the two second C-shaped bending rods 23 are respectively inserted into the four limit positions inside the fixing plate 24 .

In this embodiment, the left and right inner walls of the back-shaped fixing plate 21 are fixedly connected with two limit fixing plates 24, and the two ends of the two second C-shaped bending rods 23 are respectively inserted into the four limit fixing plates 24. It is beneficial to prevent the tooth slip phenomenon between the third rack 25 , the fourth rack 26 and the fifth gear 18 .

Specifically, please refer to FIGS. 1-5 , the surfaces of the two protective plates 22 are covered with rubber covers, and the surfaces of the two rubber covers may have anti-skid patterns.

In this embodiment, the surfaces of the two protective plates 22 are both wrapped with rubber sleeves, and the surfaces of the two rubber sleeves can have anti-skid patterns, which is beneficial to improve the impact resistance of the protective plates 22 .

Specifically, please refer to FIGS. 1-5 , the lengths of the third gear 13 , the fourth gear 14 , the second gear 12 and the first gear 11 are the same.

In this embodiment, the lengths of the third gear 13 , the fourth gear 14 , the second gear 12 and the first gear 11 are the same, which facilitates the rotational speeds of the third gear 13 , the fourth gear 14 , the second gear 12 and the first gear 11 same.

Specifically, please refer to FIGS. 1-5 , a non-slip sponge pad is fixedly connected to the lower end of the first support plate 1 .

In this embodiment, the lower end of the first support plate 1 is fixedly connected with a non-slip sponge pad, which is beneficial to improve the stability of the device.

Specifically, please refer to FIGS. 1-5 , the first support plate 1 , the second support plate 4 , the return-shaped fixing plate 21 , the sealing cover 27 and the two protection plates 22 are all made of stainless steel, and the first support plate 1 , the The surfaces of the two support plates 4 , the return-shaped fixing plate 21 , the sealing cover 27 and the two protection plates 22 are all galvanized.

In this embodiment, the first support plate 1 , the second support plate 4 , the curved fixing plate 21 , the sealing cover 27 and the two protection plates 22 are all made of stainless steel, which is beneficial to prevent the first support plate 1 and the second support plate 4. The loop-shaped fixing plate 21, the sealing cover 27 and the two protection plates 22 are corroded in contact with water, which prolongs the service life of the device. The surfaces of the sealing cover 27 and the two protection plates 22 are all galvanized, which makes the device more beautiful.

Working principle: When subjected to external force in the up and down direction, the second support plate 4 moves up and down, the first spring 2 and the second spring 7 are stretched or compressed, the rack 10 moves down, and the movement of the rack 10 drives the third gear 13. The fourth gear 14, the second gear 12 and the first gear 11 rotate, the rotation of the fourth gear 14 drives the rotation of the first bevel gear 15, and the rotation of the first bevel gear 15 drives the rotation of the second bevel gear 16 , the rotation of the second bevel gear 16 drives the rotation of the fifth gear 18, the rotation of the fifth gear 18 drives the left and right movement of the third rack 25 and the fourth rack 26, and the third rack 25 and the fourth rack 26 The left and right movement of the protection plate 22 drives the two protection plates 22 to move left and right, so as to buffer the external force in the upper and lower directions. When receiving the external force in the left and right directions, the protection plate 22 moves left and right, and the movement of the protection plate 22 drives the fourth rack 26 and the third rack 25 The movement of the fourth rack 26 and the third rack 25 drives the rotation of the fifth gear 18, the rotation of the fifth gear 18 drives the rotation of the second bevel gear 16, and the rotation of the second bevel gear 16 drives the rotation of the second bevel gear 16. The rotation of the first bevel gear 15, the rotation of the first bevel gear 15 drives the rotation of the third gear 13, the fourth gear 14, the second gear 12 and the first gear 11, the rotation of the third gear 13 and the first gear 11 The rotation drives the two racks 10 to move up and down, the two racks 10 move up and down to drive the second support plate 4 to move up and down, the first spring 2 and the second spring 7 are compressed or stretched to buffer the external force in the left and right directions. .

The above description is only a preferred embodiment of the present invention, but the protection scope of the present invention is not limited to this. The equivalent replacement or change of the improved concept thereof shall be included within the protection scope of the present invention.

Claims

An energy storage, buffering and energy dissipation device for a robot base, comprising a first support plate (1), characterized in that a second support plate (4) is arranged on the upper side of the first support plate (1), and the second support plate (4) is provided on the upper side of the first support plate (1). Round holes (9) are drilled at the four corners of the upper end of the support plate (4), and two first C-shaped bent rods (3) are arranged on the upper side of the second support plate (4). The two ends of the C-shaped bent rods (3) are respectively inserted into the four circular holes (9) and fixedly connected to the upper end of the first support plate (1). The ends are sleeved with first springs (2), the four first springs (2) are all located between the first support plate (1) and the second support plate (4), and the two circular holes (9) ) are fixedly connected to the racks (10) at the close ends, the upper end of the second support plate (4) is fixedly connected with a loop-shaped fixing plate (21), and the rear inner wall of the loop-shaped fixing plate (21) is A third gear (13), a fourth gear (14), a second gear (12) and a first gear (11) are connected in turn through the four second rotating shafts (20) from left to right, and the third gear ( 13) Meshingly connected to the left rack (10) and the fourth gear (14), the fourth gear (14) is meshingly connected to the second gear (12), and the second gear (12) is meshingly connected to A first gear (11), the first gear (11) is meshed and connected to the right rack (10), and the front end of the fourth gear (14) is fixedly connected with a first bevel gear (15), so The upper end of the second support plate (4) is rotatably connected with a second bevel gear (16) through the first rotating shaft, and the second bevel gear (16) is meshed and connected to the first bevel gear (15). A rotating rod (17) is fixedly connected to the upper end of the second bevel gear (16), and a fifth gear (18) is fixedly connected to the circumferential surface of the rotating rod (17). A fourth rack (26) and a third rack (25) are meshed and connected to the parts respectively, and the right end of the third rack (25) and the left end of the fourth rack (26) are fixedly connected with a second C-shaped Bending rods (23), the ends of the two second C-shaped bending rods (23) away from each other are fixedly connected with a protection plate (22). ), the left and right ends of the sealing cover (27) are drilled with mounting holes (28), the two mounting holes (28) are respectively matched with the two limit fixing plates (24), and the sealing cover ( 27) The lower side is provided with a limiting mechanism, the front and rear sides of the sealing cover (27) are provided with two locking mechanisms, and the upper sides of the two first C-shaped bending rods (3) are provided with elastic mechanisms .
An energy storage, buffer and energy dissipation device for a robot base according to claim 1, characterized in that: the limit mechanism comprises a limit ring (31), and the limit ring (31) is fixedly connected to the sealing cover (27). ), the rotating rod (17) is rotatably connected to the limit ring (31).
An energy storage, buffering and energy dissipation device for a robot base according to claim 2, wherein the locking mechanism comprises a fixing buckle (29), a hinge shaft (30) and a threaded groove (19), and the fixing buckle (29) is hinged to the front end of the sealing cover (27) through the hinge shaft (30), the thread groove (19) is cut out at the front end of the return-shaped fixing plate (21), and the fixing buckle (29) and the thread groove ( 19) to match.
An energy storage, buffer and energy dissipation device for a robot base according to claim 3, characterized in that: the elastic force mechanism comprises a third support plate (5), a second spring (7), a support rod (6) and a limiter Plate (8), the third support plate (5) is fixedly connected to the front ends of the upper ends of the two first C-shaped bent rods (3), and the support rods (6) are fixedly connected to the second support plate (4) The front part of the upper end of the support rod (6) penetrates the third support plate (5), the limit plate (8) is fixedly connected to the upper end of the support rod (6), and the second spring (7) is sleeved On the circumferential surface of the support rod (6), the second spring (7) is located between the limit plate (8) and the third support plate (5).
An energy storage, buffering and energy dissipation device for a robot base according to claim 4, characterized in that: two limit fixing plates (24) are fixedly connected to the left and right inner walls of the circular fixing plate (21). Both ends of the second C-shaped bent rod (23) are respectively inserted into the four limit fixing plates (24).
An energy storage, buffering and energy dissipation device for a robot base according to claim 5, characterized in that: the surfaces of the two protective plates (22) are both wrapped with rubber sleeves, and the surfaces of the two rubber sleeves can have Anti-slip pattern.
An energy storage, buffering and energy dissipation device for a robot base according to claim 6, characterized in that: the third gear (13), the fourth gear (14), the second gear (12) and the first gear (11) ) are the same length.
An energy storage, buffering and energy dissipation device for a robot base according to claim 7, characterized in that a non-slip sponge pad is fixedly connected to the lower end of the first support plate (1).
An energy storage buffer energy dissipation device for a robot base according to claim 8, characterized in that: the first support plate (1), the second support plate (4), the return-shaped fixing plate (21), the sealing cover (27) and the two protection plates (22) are made of stainless steel, and the first support plate (1), the second support plate (4), the return-shaped fixing plate (21), the sealing cover (27) and the two protection The surface of the plate (22) is galvanized.
The energy dissipation method based on the energy storage buffer energy dissipation device of the robot base according to any one of claims 1 to 9, characterized in that it includes the following steps:

When subjected to external force in the up and down direction, the second support plate moves up and down, the first spring and the second spring are stretched or compressed, the rack moves downward, and the movement of the rack drives the third, fourth, and second gears It rotates with the first gear, the rotation of the fourth gear drives the rotation of the first bevel gear, the rotation of the first bevel gear drives the rotation of the second bevel gear, the rotation of the second bevel gear drives the rotation of the fifth gear, and the rotation of the second bevel gear drives the rotation of the fifth gear. The rotation of the fifth gear drives the left and right movement of the third rack and the fourth rack, and the left and right movement of the third rack and the fourth rack drives the left and right movement of the two protective plates, so as to buffer the external force in the upper and lower directions. When the external force is applied, the protection plate moves left and right, the movement of the protection plate drives the left and right movement of the fourth rack and the third rack, the movement of the fourth rack and the third rack drives the rotation of the fifth gear, and the rotation of the fifth gear drives the rotation of the fifth gear. The rotation of the second bevel gear, the rotation of the second bevel gear drives the rotation of the first bevel gear, the rotation of the first bevel gear drives the rotation of the third gear, the fourth gear, the second gear and the first gear, The rotation of the third gear and the first gear drives the up and down movement of the two racks, the up and down movement of the two racks drives the up and down movement of the second support plate, and the first spring and the second spring are compressed or stretched to achieve buffering left and right direction of the external force.